Calculating machine



March 30, 1937.

J. A. v. TuRcK CALGULATING MACHINE 5 Sheets-Sheet 1 Original Filed May16, 1930 March 30, 1937. J. A. vjTURcK cALcuLATmG MACHINE Original FiledMay 16, 1930 5 sheets-sheet 2 March 30, 1937.

J. A. V. TURCK CALCULATING MACHINE Original Filed May 16, 1930 5Sheets-Sheet 5 e jade/fof? wauw' March 30, 1937. J. A. v. TuRcKCALCULATING MACHINE Original Filed May 16, 1930 5 Sheets-Sheet 4 March30, 1937. J. A. v. TURcK CALCULATING MACHINE Original Filed May 16, 1930Il O Patented Mar. 30, 1937 UNITED STATES PATENT OFFICE CALCULATINGMACHINE Joseph A. V. Turck, Wilmette, Ill., assignor to Felt & TarrantMfg. Co., Chicago, Ill., a corporation of Illinois 12 Claims.

This invention relates in general to improvements in calculatingmachines and, while it has more particular reference to improvements incalculating machines wherein additive actuating mechanisms areoptionally arrangeable for key responsive operation and/or key setoperation, it will be apparent that certain features of the inventionhave other and more general valuable application. This application is adivision of my co-pendingapplication Serial No. 452.876.

A principal object of the present invention is the provision (in a poweroperated ca1culat ing machine wherein the banks of ordinally arrangeddigital keys may be optionally operated as a key responsive calculatingmachine for addition and subtraction and as a key set machine formultiplication and division) of an error control mechanism operativewith both the key responsive and key set mechanisms and acting to lockthe automatic digital control devices in the event that error is made insetting up the multiplicand or divisor on the keyboard.

Another important object of the invention is the provision of a lockingmechanism for preventing manipulation of the multiplier keys when theordinal actuating mechanisms are arranged for key responsive action.

Another important object of the invention is the provision of meanswhich will prevent miscalculation resulting from an incomplete keystroke of any of the keys.

Another important object of the invention is the provision of lockingmechanism and devices which will insure against error throughmismanipulation ci any of the keys of the keyboard, occurring by reasonof insufficiently depressing a key or undertaking redepression beforecompletion of the previous stroke.

Numerous other objects and advantages of the invention will be apparentas it is better understood from the following description which, whentaken in connection with the accompanying drawings. discloses apreferred embodiment thereof.

On the drawings,

Figure 1 is a front to back vertical section taken at the right of therighthand digital order of the machine;

Fig. 2 is an elevation of a portion of the error control mechanism;

Fig. 3 is an enlarged fragmentary detail of a portion of the errorcontrol mechanism;

Fig. 4 is a section taken substantially on the line 4-4 of Fig. 3;

Fig. 6 is a front to back vertical sectional view taken through themachine and alongside .the multiple control mechanism, parts beingbroken away;

Fig. 7 is a vertical front to back sectional view illustrating means bywhich power is transmitted from the drive to the multiple controlmechanism and likewise the universal keyboard clearing device providedfor use in key set operation;

Fig. 8 is a vertical front to back section taken adjacent the lefthandside of the machine and showing a mechanism for arranging the partsoptionally for key responsive and key set operation.

The calculating machine shown on the drawings and constituting theembodiment of the invention at present preferred, comprises a casingformed of a base plate 5|, a top plate 52, a front wall 53, a rear wall54, and suitable side Walls (not shown). 'Ihe bottom and vertical wallsmay, if desired, be provided with sound deadening and cushioning packing5l. The machine shown on the drawings is of ordinal character and aplurality of accumulator actuating mechanisms for accumulator actuatingunits is provided, and the several actuating mechanisms of the addingorders of the machine are arranged between partition plates Bl. Eachadding order of the machine is provided with a series of digital controlkeys 64, each such series comprising nine keys bearing the numbers 1 to9 to be used in addition and multiplication and their complements to beused in subtraction and division.

A plurality of accumulator units, generally indicated by referencecharacter 65, are mounted in a shiftable carriage 66, which, as will bepresently more fully explained, is shiftable transversely of theactuating units and into progressive co-operative relation therewith tocause predetermined additive actuations to be received by and stored inpredetermined desired accumulator units. The carriage comprisesgenerally a frame consisting of partition plates 61 secured in spacedrelation by tie rods '68 and bushings The carriage is pivoted upon across-rod 1I mounted in upward extensions 12 of the side supportingplates and rests upon a trackway 13, in turn supported upon and fixed tosaid supporting plates. 'I'he carriage is provided with a carriagehousing 14 enclosing its rear, top, front and ends', leaving the bottomopen for co-operative engagement between the accumulator units and theadditive actuating mechanisms.

Each accumulator unit comprises a numeral wheel i5 adapted to be viewedthrough suitable sight openings in the casing housing 14 and carrying apinion V1 in mesh with a pinion 'i8 which in turn co-operates through acyclic gear 8|] with a gear 'i9 which forms a transmitting gearmechanism for advancing the numeral wheels by the desired addingmovements and in accordance with the degree of actuation of the ordinalcolumn actuators as received by a ratchet gear mechanism 8| fixed upon across-rod or shaft 82 carried in the main frame of the machine.

In the movement of the carriage and its contained accumulator unitsacross the machine, the gears 19 are disengaged from the ratchet gearmechanism ill at the beginning of a shifting movement and reentrained inco-operative relation with other ratchet gear mechanisms as may bedesired in the calculation.

Each key 64 is provided with a downwardly extending stem 8f3 arrangedthrough the keyboard plate 52 and through sub-plates 85 and 36. Springs8'1 are provided to hold the keys in elevated position and to returnthem after each key stroke. Each order of the machine includes a digitalcontrol stop bar 88 arranged to extend beneath the lower end of the keystems when the keys are in elevated position and to be pulled rearwardlyof the machine in amount determined by the additive value of theparticular key of the order depressed. The stop bar 88 is provided withdifferentially spaced lugs 89 7 adapted to engage the depressed key stemof the order, the spacing being such that the stop bar B8 has anincreasing unit movement from the l-key at the iront to the 9-key at therear of the associated order of the keys.

A link 9| is connected at 92 with a downwardly extending arm or lug 93on the stop bar B8 and at 94 to a link 95 in turn connected at 96 to arack sector 97 pivoted upon a cross-rod 98 and provided with teethcontinuously in engagement with a pinion 99 forming a part of theratchet gear mechanism 8|. The link 95 is pivotally connected at itsother or front end lll! with an arm |82 of a friction device |03 carriedupon a shaft or rod |04 extending across the machine and having bearingin the partition plates 5|. A spring |05 is connected at |06 with a link|2| to be later described.

Upon an adding movement, depression of the sector is accomplished bycontinuously moving power mechanism to which it is connected bydepression of a key, the result of this connection to the power beingthat the associated rack sector 97 is swung down the desired amount witha consequent extension of the spring |05 and the storing in it of powerto accomplish the adding movement upon disconnection of the actuatingunit aected from the power means. This power means comprises an electricmotor |08.

It is not believedthat a detailed description of the motor |08 and theWiring for its supply of current is necessary to an understanding of theinstant invention. The motor rotates continuously when the machine is inuse.

A power shaft extending across the several columns or orders of theadding machine is provided with a toothed wheel ||8 for each orderof theadding machine, these toothed wheels l I8 being arranged adjacent theseveral actuating units or mechanisms.

Referring to Fig. l, it will be noted that the friction device |03 ofeach actuating mechanism is provided with an arm H9 pivotally connectedat with a link |2| in turn pivoted at |22 in an upright guard arm |23pivotally mounted upon a cross-pin or rod |24 extending across theframe. An arm |25 having a tooth or hook |26 at its rear eno. and aspring lifted lever |21 are also pivoted to the upper end of the guardarm |23 on pivot |22.

In accomplishing a calculating operation, depression of a key causes thehook arm |25 to engage the toothed wheel H3 and to be moved a fullstroke of the machine.

The power strokes are all of a predetermined travel which is the samefor all digital values. A sector or rack segment 9i is moved downwardlyin the power stroke, only the amount permitted by the particular digitalkey depressed, downward movement of the sector continuing until haltedby engagement of the stop bar 88 with the key stem of the key depressed.The friction device |ll3 permits continuation of the movement of thelink |2| after the halting of its associated sector 97. The power strokeextends the spring |05 and stores up in it the power needed toaccomplish the adding actuation of the accumulator. Upon disconnectionof the hook |26 from the toothed wheel, the spring |05 moves the partsback to normal position, the latter part of this movement beingaccompanied by an upward movement of the rack sector 97, and, throughtoothed wheel mechanism 8|, by the desired advancement of the numeralwheel of the associated accumulator unit. The earlier part of the returnmovement under the impulse of spring |05 is taken up in the frictiondevice |03.

The control of the hook |25 prevents its engagement with the toothedwheel I8 until a particular key depressed is locked down into depressedposition where it must remain until released. A parallel motion deviceis provided for each actuating unit and includes an equalizing key bar|38 pivoted at |39 and I4| respectively to levers |42 and |43, which inturn are pivoted at |44 on rods extending through the partition platesof the frame. The parallel motion device also includes a bottom bar orlink |45 pivoted at |46 to the lower ends of the levers |42 and |43. Akey locking bar |4`| (Fig. l) is pivoted at each end at |48 to the upperends of the levers |42 and |43 and is provided with locking iingers |49adapted to enter into conically faced openings |5I of the stem as theyare depressed. Depression of this bar by a key stem in its parallelmotion Swings the levers |42 and |43 in a clockwise direction and causesthe adjacently arranged locking finger |49 to enter into the presentedopening |5| of the stem 84 of the key depressed.

The springs |3| and |32 normally hold the hook arm |25 in an elevatedposition and clear of its toothed wheel. The hook arm |25 is normallyarranged in 'elevated position and has a laterally extending shoulder orlip |52 which is normally disposed a short distance above anappropriately arranged lip |53 provided on the rear end of the link |45and is adapted to engage the upper side of lip |53 upon depression ofhook arm |25.

The key bar |38 carries a downwardly extending dog |54 which is providedat its lower end with a lug |55 arranged above and in position to engagethe lug |29 upon the spring lever |27, this dog being normally held in arearward position by a spring |51 tending to swing the dog in acounterclockwise direction and maintaining a this motion beingaccomplished through the swinging of the levers |42 and |43.

As has been earlier stated, the machine shown on the drawings anddisclosing the preferred embodiment of the invention is adapted foroperation either as apower-driven key responsive calculating machine oras a power-driven key set machine for automatic actuation.

Referring to Fig. 8, it will be noted that at the left of the series ofordinal banks or rows of r a cross-rod |94 carried by the frame.

adding keys are two keys indicated respectively by reference characters|8| and |82, the former being labeled key act. and the latter auto act.These keys are adapted for alternate depression, the depression of onekey raising the other. When it is desired to use the adding machine forkey responsive operation, the key |8| is or must be arranged indepressed position and when it is desired to use the calculating machinefor key'set automatic repeated actuations, as in multiplication andnegatively as in division, the key |82 is or must be depressed. Thesetwo keys have key stems |83 extending down through the keyboard plate 52and the sub-plates 85 and 86, and springs |84 are provided to lift thekeys when occasion permits.

A walking beam lever |85 is pivoted upon -a cross-rod |86 just below thekeys and this lever has an end |81 located beneath each key. It has alsoat each end a lock arm or finger |88 adapted to enter into an aperturein the key stem when the key is depressed and the engaged end of thelever swung downwardly to lock the parts in the assumed position.

The walking beam also has a downwardly extending arm |89 provided with aV-shaped lug or bottom |9| which may engage in either of two slots |92in a spring lock lever |93 pivoted upon A spring |95 normally tends tolift the lever |93 and maintain engagement with the V-bottom of theWalking beam lever |85. The arm |89 of this lever is connected at |96with a link |91 extending toward the back of the machine and this linkis in turn connected at |98 with an arm |99 xed upon a cross-shafthaving suitable bearings in the frameand extending past the variousorders of actuating mechanisms. This shaft is arranged closely adjacentthe dogs |54, which it will be remembered serve to depress the springlifted levers |21 and through them the hook members. into engagementwith the power toothed wheel |I8.

The shaft 20| is milled to its center at 202 adjacent each dog |54. Anarm or 'lnger 204 is provided on the dog to extend into the milledportion of the shaft when the parts are arranged for key responsiveaction. When, however, the key |82 is pressed, the shaft 20| is rockedin a counterclockwise direction (viewing Fig. 1) andall of the dogs ofthe several orders are swung toward the front of the machine movingtheir lugs or projections |55 out of registration with the lugs |29 ofspring lifted levers |21. Depression of the keys with the parts thusarranged does not cause engagement of any of the hooks with theircompanion toothed power wheels. When the machine is thus arranged,advancement of the accumulator mechanism in desired amounts is otherwiseaccomplished as will be presently explained.

Means are provided for holding the keys and the parallel motionmechanism in the positions they assume upon key depression. Referringnow to the lefthand end of Fig. 1, it will be noted that the forwardends of the links |45 are formed into lugs 205 arranged adjacentcompanion lugs 206 on latch arms 201 pivoted upon a cross-rod 208 in theframe. Each latch 201 is provided with an arm 209 having its endarranged adjacent a shaft 2|| also extending across the machine andthrough suitable bearings. This shaft is Amilled to its center at 2| 2adjacent each latch arm 209 and when swung in a clockwise direction aspring 2 I3 fast to the latch arms and to a rod 2|4 extending across theframe will pull the latch arms up into position to be engaged with thelatch extension or lug 205 of the link |45 when a key is depressed tomove the parallel motion device of its order. When the latch arms arerendered op erative the lugs 206 of the latch arm raise up into contactwith the latch extensions 205 of its companion parallel motion deviceand upon rearward movement of the link |45 becomes locked in hookedengagement with the latch arm.

Referring now to Fig. 8, it will be noted that the shaft 2| carries afixed arm 2|5 arranged in frontk to back general registration withWalking beam lever |85. The arm 2|5 is pivotally connected at 2 |6 witha link 2 |1 which extends to the arm |89 of the walking beam lever andisslotted at 2|8 to receive a pin 2|9 fixed to the arm |89.

A spring 22| normally holds the pin 2|9 in the forward end of the slot2|8'.

It will be noted that the forward movement of the dogs |54 out ofoperative position with thespring lifted levers |21 results in nodepression of these levers when a. key is pushed down and the mechanismlocked in the key set position just described. The spring lifted lever|21 and the hook arm |25 of the order involved are held up by thecompanion spring |32 until actuated by supplermental mechanism, whichwill be presently described, this mechanism being adapted to producerepeated actuations to accomplish multiplication and without the releaseor resetting of the particular key of the actuatingmechanism depressed.f

A shaft 222, having bearing in the frame, is arranged to extend acrossthe several orders of additive actuating mechanisms and is provided withan arm 223 fixed to it and arranged adjacent each such order. A latch224 is pivoted on each arm 222 at 225 and extends up to above a pin 226fixed on the companion spring lifted lever |21. Each latch 224 isprovided with a hook 221 at its upper end, adapted to engage over thepin 226 and depress the spring lifted lever |21 each time the shaft 222is rocked in a clockwise direction. A stud 228 is arranged to extend outto the left from the adjacent partition plate of the frame and forms astop limiting rearward movement of the latch 224. A spring 229 isprovided at the pivot 225 to urge the latch 224 toward this stop stud.

'It is intended that the shaft 222 will be oscillated the number oftimes determined by the digital value of the multiplier, and that likerepeated depressions of the spring lifted levers |21 willr beaccomplished. Additive accumulation will be produced in the accumulatorin accordance with the digital values of the keys depressed and lockedin key set position. Each engagement of the hooks of the orders withtheir toothed power wheels will carry the pins 226 out of engagementwith the latches 224. However, upon completion of the operative powerstroke, the parts return to the position shown in Fig. 1 with thelatches 224 again in position to depress the spring levers |21.

Referring to Fig. 6, a column or bank of keys 23| is arranged at therighthand side of the keyboard and one space removed from the ordinalcolumns of keys 64, and like them also are provided with stems 232adapted to actuate a parallel motion device comprised of an equalizingkey bar 234, two levers 235 and 236, pivoted respectively uponcross-rods |44, and a lower bar 239 pivoted at its ends to the levers235 and 236. The keys 23| are multiplier keys and depression of any oneof them results in the connection of the hook arm |25 with the toothedpower wheel for the number of repeated additive operations indicated bythe key depressed, l. e. one addition of the set-up multiplicand if thefront key, namely the l-key, be depressed; two additions if the secondkey from the front key be depressed, etc.

A ratchet segment 243 is pivotally mounted to rotate about the cross-rodor shaft 98 upon which are mounted the rack sectors 91, alreadydescribed, and this ratchet segment 243 is disposed in position tocontrol the number of reciprocations imparted to the latch 224 in numbercorresponding to the digital value of the particular key 23| depressedby the operator. In the instant i embodiment of the invention the racksectors 91 extend up to and to the rear from the pivotal supporting rod98, and the ratchet segment 243 extends downwardly from the rod 98 andinto cooperative relation with certain parts and devices to be presentlydescribed.

An arm 244 extends up above the ratchet segment 243 and is pivotallyconnected at 245 with a link 246 in turn connected at 241 with adifferentially movable slide bar 248 constructed, mounted and controlledlike the bars 88 of the additive actuating units earlier described.Depression of a key 23| results in a movement of the ratchet segment 243in an idle clockwise stroke in amount determined by the value of theparticular key depressed.

A spring 249 is suitably connected at one end to the righthand partitionplate of the frame and at 252 to the upwardly extended arm 244 forming apart of the ratchet segment member. This spring at all times tends tomove the ratchet segment in a clockwise direction and upon depression ofthe key the ratchet segment moves down and toward the front of themachine until halted by engagement of the adjacent diierentiallyarranged projection 253 upon the slide bar 248 with the stem of the keydepressed. Means are provided for returning the ratchet segment towardits normal position as described in my co-pending application Serial No.452,876.

The spring 249 is under tension, as has been explained, and isrestrained in its pulling movement upon the ratchet segment 243 and thebar 248 by a latch 254 pivoted at 255 on the bar 248 and having a hookedforward end 256 normally engaging over a stop lug 251 upon a cleat ormember 258 fixed to the adjacent partition plate of the frame at 260.The construction and arrangement of the parts are such that upondepression of a key 23| the latch 254 will be disengaged from itsholding lug 251 and the differential stop bar 248 priate differentialprojection 253 of the bar 248 engages the lowered key stem.

When'the ratchet segment is set by the depression of one of the keys 23|for a predetermined automatically oontrolled repetition of additivemovements, means are provided to hold the equalizer key bar 234 and thedepressed key in set position until the instigated calculation iscompleted, all as described in my co-pending application Serial No.452,876.

Upon depression of any one of the keys 23| a reciprocatory movement isautomatically imparted to the shaft 222. At the righthand side andbeneath the bank of keys 23| an arm 213 is iixed upon this shaft and haspivotal connection at 214 with a link 215 pivotally connected at 216 ina guard arm 211 extending up from a lower pivotal mounting 218 in theframe of the machine. A spring 219, iixed at the front at 28| in theframe of the machine, is connected to the forward end of the link 215 at282 and tends to pull the arm 213, which is xed on the shaft 222, towardthe front of the machine. Periodic controlled reciprocation rearwardlyof the machine is imparted to the arm 213 and shaft 222 under thecontrol of the keys 23|.

Means are provided for insuring complete key strokes ofthe digital keys64 of the additive actuating mechanism units, as will now be described.

A latch 393 (Fig. 2) is pivoted at 394 on each bar |45 of each parallelmotion device of the adding actuating mechanism. A spring 395 normallypresses a lip 396 of the latch 393 up into contact with the undersurface of its bar |45. A ratchet tooth 391 is provided upon a ratchetmember 398 arranged upon the upper end of a lever 399. The lever 399 ispivoted at in a yoke 402 which in turn is pivoted on a cross-rod 403extending across the several orders of additive actuating mechanism. Aspring 404 is attached at 405 to the lever 399 and to a lip 406 upon alever 401 pivoted upon a cross-rod 408. Upon depression of one of thekeys 64, the bar is moved toward the front of the machine, i. e. towardthe left (viewing Fig. 2), and the latch 393 being carried by it moveswith it and past the ratchet tooth 391.

If a key be released without fully effectiveincomplete movement all ofthe columns of keys are locked against operation as a warning or noticeto the operator of an insufficient or incomplete key stroke.

A link 409 is pivoted at 4| to the upper end of the lever 399 and isprovided at its rear end with a hook 4|2 normally engaging a stud 4|3fixed in the frame and limiting forward movement of the lever under theinfluence of the spring 404. The link 409 is pivoted at 4|4 to the upperend of an arm 4|5 in turn pivoted at its lower end at 4|6 in thecross-rod in the frame. This link 409 is provided with a laterally bentor extending lug 4|1 arranged in the path of an upwardly extending arm4| 8 attached to a shaft 4|9 extending past the several orders of themachine. This shaft 4|9 is provided with an arm 42| (Fig. 6) extendingforwardly of the machine and carry- 5 ing a lip 422 at its free end.This lip is normally arranged behind and holds forwardly the lever end423 of a companion arm 424 fixed upon a cross-shaft 425. Rocking of theshaft 4|9, upon insuiicient key stroke in any column, lifts the arm 42|and frees the arm 424 so that it may be brought to locking position aswill now be described.

The shaft 425 is provided adjacent each column of the machine, includingthe multiplying column, with a leaf 426 extending out over the tail 421of a locking dog 428 mounted upon a crossrod in the machine. Springs 429normally urge these dogs rearwardly into position to engage beneathshoulders 43| on the forward ends of the equalizer' key bars |38, 234.The springs 429 pressing upon the leaves 426 move the arm 424 in acounter-clockwise direction when the arm 42| is lifted by the incompletekey stroke of a particular column and move also the dogs into lockingposition into all of the columns except the one in which the insuicientkey stroke has occurred.

The dog 428 of this column is prevented from engaging beneath itscompanion shoulder 43| of 0 its equalizer key bar by reason of thecircumstance that the latching of the latch 393 has prevented thecomplete return to normal position of the parallel motion device. Thisis accomplished through the engagement of the arm 4I5 5 with a stop 430appropriately arranged in the path of the return reciprocation of thisarm. It will be noted that since the latch 393 is engaged at this timebehind the ratchet tooth 391 the link 409 and the arm 4|5 must move backwith the bar |45. Correction of the error by the complete and properdepression of a key permits the parts to return to normal position,whereupon the dog 428 of the column affected moves to locked positionand the complete locking of the keyboard is accomplished.

Means are provided vfor moving the ratchet tooth 391 out of the path ofthe latch 393 if and when full key stroke is accomplished. An arm 432 isprovided upon the yoke 402 to extend across the path of a roller 433carried upon the link |2| As the parts near the end of the power stroke,the roller 433 engages the arm 432 of yoke 402 and lifts the yoke aboutits pivot 403 carrying up the lever 399 to raise the ratchet tooth 391above the lower edge of the bar |45 and out of the way of the latch 393.

The yoke 402 has a rearwardly extending arm 434 formed into a bent lipat its end which is adaptedto engage beneath a shoulder 435 when thelever 399 is lifted by the roller 433. This lever is held in this upperlatched position until near the end of the return stroke when a lug 436on the bar |45 engages the upper endv of the lever 401 to disconnect itfrom the arm 434, ar-

5 ation. A rearwardly extending lug 4|0 is proranging the parts for thenext calculating operv 438 arranged at 439 on the bar |4r5 as this barand the key depressed return to normal. It has also been pointed outthat the key must be fully 401 and is adapted for engagement by thelatch 438 if the depression of a key tends or attempts to move the bar|45 in the reverse direction, i. e. upon a new adding actuation.

Referring now to Fig. '7, reference character 45| indicates a key forreleasing the column locks set into action by the insufficientdepression of a key as just described. The key 45| is provided with astem 452 which is arranged above a turnedover end 453 of a lever 454mounted in the column space between the multiplier keys and the additiveactuating keys being pivoted upon a shaft 455 extending across themachine. The lever 454- has a downward projection 456 arranged above aleaf 451 fast in the shaft 425. The position of the parts shown in Fig.'7 is that assumed normally and when the keyboard is not locked as aresult of insufficient key stroke.

It will be remembered that the shaft 425 is swung in Aacounter-clockwise direction by the springs of the latch dogs 428 afteran insufcient key stroke. This movement raises the key 45| in positionto be depressed by the operator after the correction of error and torelease the key locks. Downward movement of the key 45| swings down theleaf 451 and rocks the shaft 425 back to its normal position. Thismovement rocks the arm 424 toward the front of the machine intoreengagement with the arm 42 The latches 428 have been forced down andare held in released position by the arm 42|.

Means are provided in the machine for permitting the correction of anerror in setting up the keys of a multiplicand or a dividend. A button265 is arranged in front of each bank or column of keys of the addingactuating mechanism. This button is. provided with a stem 266 arrangedthrough the housing 261 in the casing. The lower end of the stem bearsupon a ledge 268 upon a rocker bell crank 269 pivoted upon a cross-rod 2I4. A stud 46| is arranged upon the upper arm of each rocker bell crank(there being a rocker bell crank provided for each additive order of themechanism) which stud is adapted for engagement with an upwardlyextending arm 462 formed integral with the latch 201. Depression -of thebutton 265 of a column in which a key has been set causes unlatching ofthe latch extension 205 of the bar |45 from the lug 206 of the latch 201and permits the parts to return to normal unset position.

Means are also provided to prevent engagement of the latch 393 with itscompanion tooth 391 as the parts move back to position after such arelease. It will be remembered that these latches are rendered inactiveonly after a forward adding movement of the link |2|. Thus under key-setaction if it is desired to clear a key in any column prior to an addingactuation in that column, the latch 393 must be cleared or the return ofthe link |45 will set the key locks of the whole keyboard.

This bar has no forward movement prior to a resetting operation. Thismeans is described in connection with the mechanism which is providedftoreset all of the keys after a calculation has been completed.

Referring to Fig. 7, it will be noted that a key 463 is provided betweenthe board of additive actuating mechanism keys 64 and the column ofmultiplier keys 23|. This key has a stem 464 which rests upon a lip 465of a three-arm lever 461 pivoted at 468 in the frame. The forward arm469 of this lever is arranged beneath a stud 41| on an arm 412, keyed toshaft 2| Downward depression of the key 463 rocks the lever 461, liftingthe stud 47| and rocking the shaft 2|| in a counterclockwise direction.This rocking movement forces the latches 201 down to free all of theunits of adding actuating mechanisms. This rocking of the shaft ispermitted by the slot 2 |8 and pin 2 I9 connection (Fig. 8), the spring22| returning the parts to normal operative position after a releasingmovement.

The lever 461 has a third arm 413 extending down and forwardly andpivotally connected at 414 with a link 475 extending back and connectedby a pin and slot connection 416 with a downwardly extending arm 411mounted upon a rock shaft 418 which extends across the machine inbearings 419, all as described in my co-pending application Serial No.452,876.

Means are provided for locking the multiplier keys 23| againstdepression when the machine is arranged for key-responsive operation. Itwill be remembered that the shaft 20| is rocked with the walking beamlever |85 to convert the machine from a key-responsive to a key-setcontrol and vice versa. Shaft 20| (Fig. 6) is provided at its righthandend with an arm 200 which is formed into a lug 499 adapted to engagebeneath a shoulder lug 50i when the shaft 20| is arranged in or rockedto the position shown, which is the position it assumes when the machineis i0 arranged for key-responsive action of its ordinal actuatingmechanisms. When the parts are in this position, the arm 200 preventsdepression of the bar 234 and all of the keys 23| are locked againstactuation.

While the invention has been hereinabove described and explained asincorporated in an adding or calculating machine wherein progressiveadding actuations are received for all forms of calculation and byprogressive advancement accumulators, it will be readily understood thatfrom many standpoints the invention can as readily be incorporated incalculating machines of other types and wherein additive actuation isaccomplished other than by mere progressive and successive advancementof the accumulators.

It is thought that this invention and many of its attendant advantageswill be understood from the foregoing description, and it will beapparent that various changes may be made in the form, construction andarrangement of the parts without departing from the spirit and scope ofthe invention or sacriiicing all of' its material advantages, the formhereinbefore described being merely a preferred embodiment thereof.

I claim:

l. In a calculating machine, the combination of ordinal actuatingmechanism, depressible keys regulating the additive degree of actuationof the various orders of actuating mechanism, a control mechanism forregulating the multiplicity ofv times said ordinal actuating mechanismis to be actuated and comprising other depressible keys, and an errorcontrol mechanism for locking both keys of the ordinalactuatingmechanism and the multiplicity control mechanism againstdepression upon incomplete key stroke.

2. In a calculating machine, the combination of ordinal actuatingmechanism, depressible keys regulating the additive degree of actuationof the various orders of actuating mechanism, a control mechanism forregulating the multiplicity of times said ordinal actuating mechanism isto be actuated and comprising other depressible keys, and an errorcontrol mechanism for locking the keys of said multiplicity controlmechanism against subsequent manipulation upon incomplete key stroke.

3. In a calculating machine, the combination of ordinal actuatingmechanism, depressible keys regulating the additive degree of actuationof the various orders of actuating mechanism, a control mechanism forregulating the multiplicity of times said ordinal actuating mechanism isto be actuated and comprising other depressible keys, and an errorcontrol mechanism for locking the keys of said multiplicity controlmechanism against subsequent manipulation upon incomplete key stroke ofa depressible key of the ordinal actuating mechanism.

4. In al power-driven ordinal actuating mechanism arrangeable for keyresponsive calculation and for key set calculation, an automaticmultiple control mechanism for determining the number of repeatedactuations of said actuating mechanism when arranged ior key setcalculation, and a locking device for locking said automatic multiplecontrol mechanism against manipulation when said ordinal actuatingmechanism is arranged for key responsive calculation.

5. In a calculating machine of the key set multiple control type, thecombination of keys for setting up the items to be added, other keys forcontrolling the number of times the items set shall be added, and anlerror control mechanism for locking the two sets of keys upon a partialstroke of a key of the first mentioned set.

6. In a calculating `machine of the key set multiple control type, thecombination of keys for setting up the items to be added, other keys forcontrolling the number of times the items set shall be added, and anerror control mechanism for locking the last mentioned set of keysagainst subsequent manipulation upon incomplete stroke of a key of therst mentioned set.

'7. In a calculating machine, the combination of ordinal actuatingmechanism, depressible keys regulating the additive degree of actuationof the various orders of actuating mechanism, a control mechanism forregulating the multiplicity of times said ordinal actuating mechanism isto be actuated and comprising other depressible keys, and inter-ordinaldevices for locking both keys of the ordinal actuating mechanism and themultiplicity control mechanism against depression upon incompletekeystroke.

8. In a calculating machine, the combination of ordinal actuatingmechanism, depressible keys regulating the additive degree of actuationof the various orders of actuating mechanism, a control mechanism forregulating the multiplicity of times said ordinal actuating mechanism isto be actuated and comprising other depressible keys, inter-ordinaldevices for locking both keys of the ordinal actuating mechanism and themultiplicity control mechanism against depression upon incomplete keystroke, and means for releasing said looking devices.

9. In a calculating machine, the combination lil of ordinal actuatingmechanism, depressible keys regulating the additive degree of actuationof the various orders of actuating mechanism, a control mechanism forregulating the multiplicity of times said ordinal actuating mechanism isto be actuated and comprising other depressible keys, and inter-ordinaldevices for locking the keys of said multiplicity control mechanismagainst subsequent manipulation upon incomplete key stroke,

l0. In a calculating machine, the combination of ordinal actuatingmechanism, depressible keys regulating the additive degree of actuationof the various orders of actuating mechanism, a control mechanism forregulating the multiplicity of times said ordinal actuating mechanism isto be actuated and comprising other depressible keys, and inter-ordinalfull-stroke compelling devices for locking both keys of the ordinalactuating mechanism and the multiplicity control mechanism uponmismanipulation to notify the operator of error.

11. In a power-driven ordinal actuating mechanism, optionallyarrangeable for key responsive calculation or for key set calculation,Van automatic multiple control mechanism for determining the number ofrepeated actuations of said actuating mechanism when arranged for keyset calculation, keys controlling said automatic multiple controlmechanism, andv means for locking said keys against manipulation whensaid ordinal actuating mechanism is arranged for key responsivecalculation.

12. In a calculating machine, the combination I of ordinal actuatingmechanism, depressible keys regulating the additive degree of actuationof the various orders of actuating mechanism, a control mechanism forregulating the multiplicity of times said ordinal actuating mechanism isto be actuated and comprising other depressible V keys, andinter-ordinal full-stroke compelling devices for locking the keys ofsaid multiplicity control mechanism against subsequent manipulation uponmismanipulation of the rst named keys to notify the operator of error.

JOSEPH A. V. TURCK.

